At this time, the latest versions are Haxe 4.2.5, Lime 7.9.0, and OpenFL 9.1.0. For someone starting a new project, I recommend simply using these versions.
However, I should mention that we’re about to release Lime 8.0.0 and OpenFL 9.2.0. These updates will contain a ton of helpful bug fixes, and I recommend updating to them once they’re available.
EDIT: Lime 8 and OpenFL 9.2 are now available: Lime 8.0.0 and OpenFL 9.2.0 Release